Trochlear nucleus 4294944 207399766 2008-04-22T17:18:52Z Arcadian 104523 /* Additional images */ -image {{Infobox Brain| Name = {{PAGENAME}} | Latin = nucleus nervi trochlearis | GraySubject = 188 | GrayPage = 807 | Image = Drn.png | Caption = Outline of the [[nucleus raphe dorsalis]]:<BR>'''DRif''' interfascicular subnucleus,<BR>'''DRv''' ventral subnucleus<BR>'''DRvl''' ventrolateral subnucleus<BR>'''DRd''' dorsal subnucleus<BR>'''mlf''' [[medial longitudinal fasciculus]]<BR>'''Aq''' [[cerebral aqueduct]]<BR>'''IVn''' [[trochlear nucleus]]. | Image2 = Gray696.png | Caption2 = The [[cranial nerve nuclei]] schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Trochlear is "IV") | IsPartOf = | Components = | Artery = | Vein = | BrainInfoType = hier | BrainInfoNumber = 504 | MeshName = n_11 | MeshNumber = 12582022 | }} The '''nucleus of the trochlear nerve''' is located in the [[midbrain]], at the level of the [[inferior colliculus]]. It is a motor nucleus, so located near the midline. Oddly, fibers from the trochlear nucleus cross over in the midbrain at the [[superior medullary velum]] and exit posteriorly, (this is the only cranial nerve to do so). The nerve then goes around the midbrain, and is visible coming out the sides. ==See also== * [[trochlear nerve]] ==Additional images== <gallery> Image:Gray697.png|Nuclei of origin of cranial motor nerves schematically represented; lateral view. Image:Gray774.png|Scheme showing central connections of the optic nerves and optic tracts. Image:Brain stem sagittal section.svg|Brain stem sagittal section </gallery> ==External links== * {{UMichAtlas|n2a4p4}} - "Brainstem, Cranial Nerve Nuclei, Sagittal Section, Medial View" * {{eMedicineDictionary|nucleus+of+trochlear+nerve}} {{Mesencephalon}} {{Cranial nerves}} [[Category:Peripheral nervous system]] [[Category:Cranial nerves]] [[Category:Nervous system]]